Earlier quoted context omitted.
I don't think anyone uses the photo for biometric identification. I thought those devices you look at in line simply take a photo of you on entry. In most countries you still face the customs officer who looks at you and your documents.
eGates at UK airports do programmatically allow entry based solely on a facial recognition match between the person standing at the gate and the file on their passport's chip. I'm not sure how I feel about that.
The border agent, when handed an EU passport, does exactly the same (match the photo to the face) and nothing much more. What exactly is the problem with automating that?